package com.itheima.config;

import com.rabbitmq.client.ConnectionFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;


@Configuration
public class RabbitConfig {

/**

 Broker:它提供一种传输服务,它的角色就是维护一条从生产者到消费者的路线，保证数据能按照指定的方式进行传输,

 Exchange：消息交换机,它指定消息按什么规则,路由到哪个队列。

 Queue:消息的载体,每个消息都会被投到一个或多个队列。

 Binding:绑定，它的作用就是把exchange和queue按照路由规则绑定起来.

 Routing Key:路由关键字,exchange根据这个关键字进行消息投递。

 vhost:虚拟主机,一个broker里可以有多个vhost，用作不同用户的权限分离。

 Producer:消息生产者,就是投递消息的程序.

 Consumer:消息消费者,就是接受消息的程序.

 Channel:消息通道,在客户端的每个连接里,可建立多个channel.

 */


private final Logger logger = LoggerFactory.getLogger(this.getClass());



    @Value("${spring.rabbitmq.host}")
    private String host;



    @Value("${spring.rabbitmq.port}")
    private int port;



    @Value("${spring.rabbitmq.username}")
    private String username;



    @Value("${spring.rabbitmq.password}")
    private String password;





    public static final String EXCHANGE_A = "my-mq-exchange_A";

    public static final String EXCHANGE_B = "my-mq-exchange_B";

    public static final String EXCHANGE_C = "my-mq-exchange_C";





    public static final String QUEUE_A = "QUEUE_A";

    public static final String QUEUE_B = "QUEUE_B";

    public static final String QUEUE_C = "QUEUE_C";



    public static final String ROUTINGKEY_A = "spring-boot-routingKey_A";

    public static final String ROUTINGKEY_B = "spring-boot-routingKey_B";

    public static final String ROUTINGKEY_C = "spring-boot-routingKey_C";



    @Bean
    public CachingConnectionFactory connectionFactory() {

        CachingConnectionFactory connectionFactory = new CachingConnectionFactory(host,port);

        connectionFactory.setUsername(username);

        connectionFactory.setPassword(password);

        connectionFactory.setVirtualHost("/");

        connectionFactory.setPublisherConfirms(true);

        return connectionFactory;

    }



    @Bean

    @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)

//必须是prototype类型

    public RabbitTemplate rabbitTemplate() {

        RabbitTemplate template = new RabbitTemplate(connectionFactory());

        return template;


    }


}
